Stair-marking tool.



No. 828,413. PATENTED AUG. 14, 1906.

M. LEBLANC. STAIR MARKING TOOL.

APBLIATION FILED FBB.5,1906.

2 SHEETS-SHEET 1.

PATENTED AUG. 14, 1906.

M. LE BLANC. STAIR MARKING TOOL. APPLIOATION FILED rnB.5.19o6.

.lnventor,

2 SHEETS-SHEET 2.

Attorneys nnTTn sTATns TATnNT oTTrcn.

MAXIME LEBLANC, CF MONTREAL, CANADA STAlR-IVIARKING TOOL.

Specification of Letters Patent.

Patented Aug'. 14, 1906.

Application lefl February 5, 1906. Serial No. 299.491.

To (tI/Z whom, it 11m/y concern:

Be it known that I, MAXIME LEBLANC, a subject of the King of GreatBritain, residing in the city and district of Montreal, in the Provinceof Quebec, Canada, have invented certain new and useful Improvements inStair-Marking Tools; and I do hereby declare that the following is afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertainsto make and use thesame.

My invention relates to stair-building tools.

The object of my invention is to provide a tool by means of which gainsmay be marked out on either side of a piece of timber.

A further object is to provide a tool which I may be set Jfrom eitheredge of a piece of timber to mark gains therein.

A further object is to provide a tool which will indicate the positionof the tread and riser of the next succeeding step as the gains of astep are marked, the device forming the subject-matter of thisapplication being an improvement over the device forming thesubject-matter of my allowed United States application, Serial N o.263,691, patented January 30, 1906, No. 811,233; and my inventionconsists of the construction, combination, and arrangement of parts, asherein illustrated, described, and claimed.

In the accompanying drawings, forming .part of this application, I haveillustrated one form oi' embodiment of my invention in which A drawingssimilar reference characters designate corresponding parts, and inwhich- Figure 1 is a plan view of the tool, a guide member being shownin full and dotted lines in diiierent positions. Fig. 2 is an edgeelevation of the tool. Fig. 3 is a perspective of a plate adapted toindicate the position of vthe next succeeding riser as the gains of onestep are being marked. Fig. 4 is a perspective view of a plate adaptedto indicate the position of the tread of the next succeeding step as thegains of one step are being marked. Fig. 5 is a side elevation of astairtimber, showing the application of the tool thereto and showing thetread and riser of one step in section. Fig. 6 is a side elevation of astair-timber, showing the application of the tool thereto, the guidemember of the tool being shown disposed on the upper edge of the timberand in areversed position to that shown in Fig. 1. Fig. 7 is a plan viewof the tool, the gain-marking plates and the edgeguides being removed;and Fig. 8 is an edge tool.

Referring to the drawings, 1 1 designate graduated slotted arms securedtogether at one end by thepivot 2. Adjustably connecting the arms 1 is agraduated segment 3, and one of the arms 1 is provided with aspringactuated member 4, adapted to engage the segment 3. The same arm 1is provided with a set-screw 5, adapted to lock the arm on the segment3. All of the foregoing parts are of common construction, but preferablyas described in my said United States application.

Disposed on one of the arms 1 is a proj ecing plate 6, having a flange 7and also provided with a lug 8, adapted to slide in the slot 8a' in oneof the members 1, a suitable setscrew 9 being used to lock the plate inthe desired position. As the implement is set in position to mark thegains of one step the upper line of the next succeeding tread may bemarked by passing a scribe or pencil along the flange 7.

Disposed on one ofthe arms 1 is a plate 10, provided with aA flange 11and adjustably held in position byla set-screw 12, working in a slot.8b. I/Vhen the tool is in position to mark the gains of one step, thefront line of the next succeeding riser may be indicated on the timberby passing a scribe or pencil along the flange 11.

Disposed on both sides of each of the arms 1 are marking-plates 13, bymeans of which the gains for the risers and treads may be outlined. Theobject of placing these plates on both sides of the arms 1 is to providemeans whereby opposite sides of a piece of timber may be marked. Withthe plates on one side only the tool cannot be reversed on account ofthe projecting parts.

For the purpose of setting the tool at the desired distance from theedge of the timber elevation of the edge-guide used with the to bemarked I provide a guide-plate 14, hav- .i

ing slots 15 therein and having iianges 16 intermediate of its ends onone edge. Carried by the ilanges 16 are guide-buttons 17, pivotallyconnected to the flanges 16, as by the screws 18. The guide-plate 14 isprovided intermediate of its ends with a screw-threaded lug 19 and a lug20. For the purpose of attaching the plate 14 to the members 1 I providea plate 21, having openings 22, adapted to receive the lug 20, andhaving elongated slots 23, adapted to receive the lug 19. For thepurpose vof attaching the plate 21 to the members 1 a thumb-nut 24 IOOIOS

IIC

engages a screw-threaded lug 25, carried by one of the members, theplate being provided with a suitable opening adapted to engage over saidlug and provided with a suitable opening to receive the set-screw 26. Tosecure the guide-plate' 14 to the plate 21, a suit` able thumb-nut 27 isprovided to engage the screw-threaded lug 19.

As shown in Fig. 5, the-plate 14 may be adjustably attached to the arms1 to engage the under side of the stair-timber by means of the screws28. In Fig. 6 the application of the tool is shown with the guide-plateengaging the upper edge of the stair-timber, the buttons 17 holding theplate 14 in position.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a device ofthe character described, a pair of pivotally-connectedarms, in combination with a guide-plate, and means for attaching theguide-plate adjacent the pivotal connection of the arms.

2. In a device of the character described, a pair of pivotally-connectedarms, in combination with a guide-plate, means for attaching theguide-plate adjacent the pivotal connection of the arms, and pivotedstops on the guide-plate.

3. In a device of the character described, a pair of pivotally-connectedarms, in combination with a guide-plate provided with flanges, buttonspivoted to the lianges, and means for attaching the guide-plate adjacentthe pivotal connection of the arms.

4. In a device of the character described, a pair of pivotally-connectedarms, in combination with a guide-plate provided with lugs, a perforatedattaching-plate adapted to receive the lugs, a thumb-nut on one of thelugs, and means for securing the attachingplate to the arms.

5. In a device ofthe character described, a pair of pivotally-connectedarms, one of' which is provided with a lug adjacent the pivotalconnection, a perforated attachingplate disposed over the lug, asetwscrew on the lug, and a guide-plate attached to the attaching-plate.

6. In a device ofthe character described, a pair of pivotally-connectedarms, in combination with an attaching-plate secured to said arms andprovided with perforations and elongated openings, and a guide-plateprovided with lugs engaged by said perforations and openings secured tothe attachingplate.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

MAXIME LEBLANC.

Witnesses:

T. MYNARD, Jos. J. B. CHARBONNEAU.

